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APPLICATION FILD ,AN. 26., 19|6. 1,274,231. Patented July 3o, 1918.

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APPUCA'HON min JAN. 26. |916.

Patented July 30, 19H3.

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JOI-IN BAIRS, 0F ARGENTA, ARKANSAS.

SAW.

Specieation of Letters Patent.

Patented J uly 30, 1918.

Application filed January 26, 1916. Serial No. 74,481.

To all whom it may concern.'

Bc it known that I, JOHN Bains, a citizen of the United States, residing at Argenta, in the county of Pulaski and State of Arkansas, have invented new and useful Improvements in Saws, of which the following is a specification.

This invention relates to an improvement in circular saws, of that class primarily adapted for cutting logs into blocks, and the object of thc invention is to provide the saw with a weighted frame designed to tilt the saw to bring the same above the log to be cut by the saw, whereby to permit of the proper adjustment of the log with respect to the saw, means being provided upon the said frame for regulating the rotary movement of the shaft upon which the saw is supported as well as for imparting a momentum to the said shaft.

A further object of the invention is to provide the shaft of the saw with the motive power, in such a manner as to effect the positive rotation of the shaft when the saw is in working position to permit said shaft remaining idle 0r almost idle when the frame is tilted and the saw brought away from its cutting position.

lith the above and other objects in view, the improvement resides in the construction, combination and arrangement of parts set forth in the following specilication and falling within the scope of the appended claim.

In the drawings:

Figure 1 is a side elevation of a sawing machine constructed in accordance with the present invention, the saw being swung to its elevated or non-cutting position,

Fig. 2 is a similar view with the saw in working position,

Fig. 3 is a top plan view of the improvement,

Fig. 4 is a vertical longitudinal sectional View approximately on the line k1 of Fig. 3 and Fig 5 is a transverse sectional view approximately on the line 5 5 of Fig. 3.

In the accompanying drawings the numeral 1 designates a bed or frame which in the present instance is mounted on wheels 2, so that the same may be readily propelled to a desired location.

Arranged upon the bed 1 to what I will term the rear thereof is a motor such as a as or gasolene engine 3. The shaft 4 of time motor 3 is provided with a fly wheel 5 and with a belt wheel 6. The forward end of the bed 1 is provided with a transversely arranged rest p ate 7 for the work to be operated upon by the saw and the bed 1 between the motor 3 and the rest plate 7 is provided with diamctrically opposite bearings 8 and 9 which provide journals for a transversely arranged shaft or axle 10 connected with a longitudinally arran ed saw frame 11. The frame 11 preferab y comprises two side members l2 connected at desired intervals by transverse members 13 and the rear of the frame, or the portion thereof disposed adjacent the motor 3, may be provided with a suitable weight 14 to insure the tilting of the frame so that the forward end of the same is normally elevated above thc bed 1. Journaled in suitable bearings 15 upon the upper face of the frame at the rear end thereof above the weight 14 is a transversely arranged shaft 16 which has keyed to its opposite ends fly wheels 17-17, and keyed to said shaft 16 between the bearings 15 is a belt wheel 18. The outer end of the saw frame has its sides 12 provided with bearings 19 in which is journaled a transversely disposed saw shaft 20. This shaft has keyed to one of its wheels a belt wheel 21, while arranged upon the opposite end of the said shaft are arranged spaced clamps 22, between which is secured a circular saw 23. The numeral. 211 designates a guard for the saw and the numerals 25 designate stop members for thc work arranged upon the rest plate 7, designed to be operated upon by the saw. The bed 1 in a line with the saw, is provided with a longitudinally extending slot or groove 26 to receive the saw when the said saw is swung in the direction of the bed 1, to operate upon the log or work supported upon the rest plate 7.

Keyed to the saw shaft 20 between the bearings 1D is a belt wheel 28, andtrained over this wheel, as well over the wheel 18, is an endless belt 29. For this belt 29 I provide a tightening device, broadly designated by the numeral 30, the same including a substantially yoke shaped member or frame 31 provided adjacent its rear end with transverse openings forming bearings for a shaft 32, the same having angular ends 33 which extend downwardly toward and which are secured to the saw frame 11. The opposite end of the belt tightener frame 31 is bifurcated and the members provided by the bifurcation are formed with aliningr openings that provide bearings for a shaft 34, and upon this shaft is journaled a roller 35 which is arranged directly above the upper lead of the belt 29. The numerals 36 designz'lte ehain members Connected to the forward ends of the belt ti ghtener frame 31, and the numerals 3T designate hooks provided upon the saw frame adapted to receive certain of the links of the chains 211' lo hold the roller 35 in contact with the belt 29. The foree of contact between the roller 35 and the belt 29 may be. readily regulated by bringing eertain desirable links of the chains Q6 into engagement with the hooks, as will be readily understood.

The bearing 9, which is arranged on the Side of the bed l intermediate of the belt wheel 6 of the niotor shaft 4 and the belt elines toward the rear of the bed.

wheel 21 of the saw shaft Q() is projected above the bed 1 for a greater distance than is the bearing 8 and this portion of the said bearing fl comprises a fiat member which in- This flat portion indicated for distinction by the numeral 3S has secured thereto outwardly eX- tending spaced shafts or axles 39 and 40 respectively, the axle It() formingr a continuation of the shaft 10.

Upon the axles 3f) and 40 are journaled guide rollers 42 and 41 respectively, which are in the nature of guide members for an endless belt 42 which is trained'around the =.belt pulleys 21 of the saw shaft 20 and 6 of the motor shaft Li. By reference to the drawings, it will be noted that the upper lead of the belt 42 is disposed to engage with the under face of the roller 42, while the lower lead of the said belt eontaets with the lower faee of the roller 41. The numerals 44 designate the grease eups arranged upon the outer ends of the shafts or axles 39 and 40, whereby to supply the rollers 42 and 41 With a lubricant to insure the free rotation of the said rollers around the said shafts. The forward end of the saw frame 12 to the rear of the saw shaft is provided with arsubstantially U-shaped bail 423 which serves as a handle for swinging the frame 1l to bring' the saw to its work. lt will be seen that the fly wheels 1T serve as a eounter-balance to hold the frame in its tiited position with the `saw away from the work. By reason of the fact that the distance be tween the pulleys .91 and Jal, when the saw is in raised position, is less than the distance between said pulleys when the saw is in lowered position, the belt 42 is slaekened when the saw frame is tilted with the saw in raised position, thus reducingn wear on the belt and perlnittitng the saw to run light when in inoperative position. lWhen the saw is in its lowest or operative position the belt will be tightened so as to cause a positive rotation of the saw when engaged with the work.

Having thus described the invention, what I claim is:

A device of the class described comprising a platform, a transverse shaft mounted thereon7 a longitudinally arranged saw frame pivoted on said shaft intermediate its ends, a saw shaft farried by the outer end of said frame, a shaft earried at the inner end of said frame, belt pulleys on said shafts, a belt conneeting said pulleys, {ly wheels on the shaft at the inner end of the frame, serving as a counter-balaneing means for the frame, a belt pulley on the outer end of the saw shaft, a lnotor on the platform, a pulley on the motor shaft, a belt connecting the last mentioned pulleys together and a guide pulley on the. projecting end of the transverse shaft and engaging with said belt.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN BAIRS.

lVitnesses:

CoNs'rAN'rxN BAms, E. E. MCINDoo.

00M l! this partent may be obtained tor ve cents each, by addressing the I(Ionnirlssioner of Patenti,

Washington, ID. C. 

